/* ==========================================================================
   BreatheClear — Vaping Health Information
   Shared stylesheet
   ========================================================================== */

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f8f8;
  --color-surface: #ffffff;
  --color-primary: #0d7a6f;
  --color-primary-dark: #095c54;
  --color-primary-light: #e3f2f0;
  --color-accent: #d9822b;
  --color-text: #1f2d2b;
  --color-text-muted: #55635f;
  --color-border: #dde6e4;
  --color-danger: #c0392b;
  --color-danger-light: #fdeceb;
  --color-warn: #b8860b;
  --color-warn-light: #fbf3e0;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(15, 45, 43, 0.08);
  --shadow-md: 0 6px 20px rgba(15, 45, 43, 0.10);
  --maxw: 1120px;
  --font-body: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  --font-head: "Segoe UI Semibold", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  line-height: 1.25;
  color: var(--color-text);
  margin: 0 0 0.5em;
}

h1 { font-size: 2.2rem; }
h2 { font-size: 1.6rem; margin-top: 1.6em; }
h3 { font-size: 1.2rem; margin-top: 1.4em; }

p { margin: 0 0 1.1em; }

ul, ol { margin: 0 0 1.2em; padding-left: 1.4em; }
li { margin-bottom: 0.5em; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 16px;
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ---------- Header / Nav ---------- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 20px;
  max-width: var(--maxw);
  margin: 0 auto;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 34px; height: 34px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 9px;
  display: grid;
  place-items: center;
  font-size: 20px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-links a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 600;
}
.nav-links a:hover { background: var(--color-bg-alt); color: var(--color-primary-dark); text-decoration: none; }
.nav-links a.active { color: var(--color-primary-dark); background: var(--color-primary-light); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--color-primary-dark);
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #0d7a6f 0%, #0a5f57 100%);
  color: #fff;
  padding: 64px 0;
}
.hero h1 { color: #fff; max-width: 18ch; }
.hero p { font-size: 1.15rem; max-width: 60ch; color: #e6f5f2; }
.hero .btn { margin-top: 12px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: transform .08s ease, background .2s ease;
}
.btn:hover { background: #c0741f; text-decoration: none; transform: translateY(-1px); }
.btn-outline {
  background: transparent;
  border: 2px solid #fff;
  color: #fff;
}
.btn-outline:hover { background: rgba(255,255,255,.12); }
.btn-secondary { background: var(--color-primary); }
.btn-secondary:hover { background: var(--color-primary-dark); }

/* ---------- Sections ---------- */
main { display: block; }
.section { padding: 56px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-title { text-align: center; margin-bottom: 8px; }
.section-lead { text-align: center; color: var(--color-text-muted); max-width: 65ch; margin: 0 auto 36px; }

/* ---------- Cards grid ---------- */
.grid {
  display: grid;
  gap: 22px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform .12s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.card .icon {
  width: 48px; height: 48px;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: 12px;
  display: grid; place-items: center;
  font-size: 24px;
  margin-bottom: 14px;
}
.card h3 { margin-top: 0; }
.card p { color: var(--color-text-muted); margin-bottom: 0.6em; }
.card a.more { font-weight: 600; }

/* ---------- Article layout ---------- */
.page-head {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 44px 0 36px;
}
.page-head .eyebrow {
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}
.page-head p.lead { font-size: 1.12rem; color: var(--color-text-muted); max-width: 68ch; margin-bottom: 0; }

.breadcrumbs { font-size: .85rem; color: var(--color-text-muted); margin-bottom: 14px; }
.breadcrumbs a { color: var(--color-text-muted); }

.article {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 48px;
  padding: 48px 0 64px;
}
.article-body { max-width: 74ch; }
.article-body h2 { border-bottom: 2px solid var(--color-primary-light); padding-bottom: 6px; }
.article-body img { border-radius: var(--radius); margin: 24px 0; }

/* ---------- Sidebar ---------- */
.sidebar { position: sticky; top: 90px; align-self: start; }
.sidebar .widget {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 22px;
}
.sidebar h4 { margin-top: 0; font-size: 1rem; }
.toc { list-style: none; padding: 0; margin: 0; }
.toc li { margin-bottom: 6px; }
.toc a { font-size: .92rem; color: var(--color-text-muted); }
.toc a:hover { color: var(--color-primary); }

/* ---------- Callouts ---------- */
.callout {
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
}
.callout.warning { border-color: var(--color-warn); background: var(--color-warn-light); }
.callout.danger { border-color: var(--color-danger); background: var(--color-danger-light); }
.callout p:last-child { margin-bottom: 0; }
.callout strong { color: var(--color-text); }

/* ---------- Stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  margin: 30px 0;
}
.stat {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.stat .num { font-size: 2.2rem; font-weight: 800; color: var(--color-primary-dark); font-family: var(--font-head); }
.stat .label { color: var(--color-text-muted); font-size: .95rem; }

/* ---------- Facts table ---------- */
.table-wrap { overflow-x: auto; margin: 24px 0; }
table.facts {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
  font-size: .96rem;
}
table.facts th, table.facts td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
table.facts thead th {
  background: var(--color-primary);
  color: #fff;
}
table.facts tbody tr:nth-child(even) { background: var(--color-bg-alt); }

/* ---------- Myth / Fact ---------- */
.mf { display: grid; gap: 18px; margin: 24px 0; }
.mf-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.mf-myth { background: var(--color-danger-light); padding: 16px 20px; font-weight: 600; }
.mf-myth::before { content: "Myth: "; color: var(--color-danger); font-weight: 800; }
.mf-fact { background: var(--color-surface); padding: 16px 20px; }
.mf-fact::before { content: "Fact: "; color: var(--color-primary-dark); font-weight: 800; }

/* ---------- FAQ / accordion ---------- */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  background: var(--color-surface);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 16px 20px;
  font-size: 1.02rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
}
.faq-q:hover { background: var(--color-bg-alt); }
.faq-q .chev { transition: transform .2s ease; color: var(--color-primary); flex-shrink: 0; }
.faq-item.open .faq-q .chev { transform: rotate(180deg); }
.faq-a { padding: 0 20px; max-height: 0; overflow: hidden; transition: max-height .28s ease, padding .28s ease; color: var(--color-text-muted); }
.faq-item.open .faq-a { padding: 4px 20px 18px; max-height: 600px; }

/* ---------- Resource / link list ---------- */
.resource-list { list-style: none; padding: 0; }
.resource-list li {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  margin-bottom: 12px;
  background: var(--color-surface);
}
.resource-list strong { display: block; }
.resource-list span { color: var(--color-text-muted); font-size: .93rem; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--color-primary-dark);
  color: #fff;
  text-align: center;
  padding: 52px 0;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: #d6ece9; max-width: 60ch; margin: 0 auto 20px; }

/* ---------- Forms ---------- */
.form-grid { display: grid; gap: 16px; max-width: 640px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .95rem; }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font: inherit;
  color: var(--color-text);
  background: var(--color-surface);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}
.field textarea { min-height: 140px; resize: vertical; }
.form-note { font-size: .85rem; color: var(--color-text-muted); }
.form-status { font-weight: 600; margin-top: 8px; }
.form-status.ok { color: var(--color-primary-dark); }
.form-status.err { color: var(--color-danger); }

/* ---------- Disclaimer box ---------- */
.disclaimer {
  background: var(--color-warn-light);
  border: 1px solid #ecd9a8;
  border-radius: var(--radius);
  padding: 18px 22px;
  font-size: .92rem;
  color: #6b551f;
  margin: 30px 0;
}
.disclaimer strong { color: #6b551f; }

/* ---------- Footer ---------- */
.site-footer {
  background: #0b2b28;
  color: #cfe0dd;
  padding: 48px 0 24px;
  font-size: .93rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 30px;
}
.site-footer h4 { color: #fff; font-size: 1rem; margin-bottom: 12px; }
.site-footer a { color: #a9cfc9; }
.site-footer a:hover { color: #fff; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 8px; }
.footer-brand .brand { color: #fff; margin-bottom: 12px; }
.footer-brand .brand .logo { background: var(--color-accent); }
.footer-brand p { color: #9fbdb8; max-width: 34ch; }
.footer-bottom {
  border-top: 1px solid #1c433e;
  margin-top: 34px;
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: #8fb0ab;
  font-size: .85rem;
}
.footer-bottom a { color: #a9cfc9; }

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.small { font-size: .88rem; color: var(--color-text-muted); }
.pill {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  margin-bottom: 12px;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .article { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  h1 { font-size: 1.8rem; }
  .hero { padding: 44px 0; }
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    gap: 2px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}